- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)2,423
- Héderváry, Claire de18
- Open Media Research Institute12
- Samizdat Archives12
- Open Society Archives at Central European University8
- Samizdat Archives of Radio Free Europe7
- Soviet Red Archives7
- Monitoring Unit6
- Bortstieber, Gertrud4
- Radio Free Europe and Radio Liberty, Inc.4
- Grigor, Murray3
- Lennauchfilm3
- Radio Free Europe/Radio Liberty, Inc - Research Institute3
- Razbezhkina, Marina3
- Romm, Mikhail3
- Đorđević, Aleksandar3
- Aleksandrov, Grigori2
- Berdiaev, Nikolai2
- Bethell, Nicholas2
- Chamberlin, William Henry2